Paint and varnish remover.



UNITED STATES PATENT OFFICE,

' CARLETON ELLl Ol LAltCHMONT, NEW YORK, ASSIGNOR TO CHADELOID CHEMICAL COMPANY, OF NEW YORK, N. Y., it CORPORATION OFWEST VIRGINIA.

Specification of Letters Patent.

Patented Nov. 17, 1908.

Applicatiop filed August 6, 1907. Serial No. 387,274.

To all whom it may concern:

Be it known that I, CARLETON ELLIS, a I

citizen of the United States, residing at Larchmont, \Vestchester county, New York, 3

have invented a new and useful Improvement 1n Paint and Varnish -Removers, of

E fur. This goes partly into solution and rewhich the following is a specification.

My lnvention relates to that class of paint and varnish removers comprising a mixture It i) of volatile solvents designed to bring the paint and varnish partially or wholly into solution and a thickening agent for the purpose of preventing the evaporation of the volatile solvents while they are acting on the surface from which the coating is to be re- I moved.

More particularly it relates to those removers in.v which one or more of the solvents is a solvent of the material used to thicken the 001 osition while one or more of the other so vents therein do not dissolve the thickener but are v cvertheless soluble in the other "olatile solvents used in the com osition. In the making of a composition this character the thickening material, or the substance from which the thickening matOIltIl'IiS subsequently to be derived, is first dissolved in those components which are solvents of it, then the other paint and varnish solvents which do not dissolve the thickener and which are consequently eliminants or recipitants thereof are added. This results in producing a supersaturated solution ofthe thickener. That is to say, some of the latter is thrown out into the liquid undissolved and disseminated throughout the body thereof in a very finely divided state. This suspended matter is so very finely divided and the physical phenomena present under these cir' cumstances are such that the material thrown out of solution will remain suspended for an almost indefinite period of time.

My invention may be embodied in any one of several different forms. in each one of which a'great many changes might be made 3 upon the excess of sulfur chlorid decomposin the minor details and in the substitution of equivalents, etc, without departing from the fundamental principles of my discovery. In all of these modifications, however, I make use of the properties of sulfur or its compounds as thickener-s for retarding the evaporation of the volatile solvents.

In the preferred form of my invention I I l g mix sulfur chlorid, that is to say the compound S 01 with carbon disulfid or an equivalent thereof in which it readily dissolves and then add a sulfur eliminant such as alcohol which decomposes the sulfur compound throwing out a quantity of free sulmains partly suspended in the liquid in a very finely divided condition. The sulfur compound is added in excess to take advantage of the fact that sulfur chlorid is decomposed by the moisture in the air and probably even by dry air to produce free sulfur. So that when the remover has been applied to the surface bein treated the atmosphere acts upon the nut ecomposed portion of the chlorid throwing out a further quantity of free sulfur, which in this case remains entirely in suspension as the mixture of solvents in the composition is already saturated by the sulfur previously separated from the sulfur chlorid.

The details of my preferred modification are as follows: I make a solution of Carbon disnlfid 75 parts Benzol 25 Sulfur chlorid and then add thereto wood alcohol to parts. i

The sulfur eliminant, which in this case is wood alcohol, reacts upon the sulfur chlorid breaking it up into free sulfur, some oxida-' tion products of sulfur such as thiosulfuric acid, tetrathionic acid, etc, and is itself changed to a chlorin substltution product.

A portion of the free sulfur is dissolved by ing it with the formation of free sulfur, and

sulfurous, thiosulfuric and hydrochloric acids. The separated free sulfur operates to produce a superficial scum or film on the surface of the liquid forming thus an added rotection from evaporation. It is probable that the oxygen of the air even when .dry also effects to some extent a decomposi- I the ketones, among which acetone might be tion of the sulfur chlorid'separating out free sulfur.

mentioned.

VVhat I claim and desire to cover by Let- The second modification of my invention ters Patent is:

' 1'. A composition for removing paint or consists in making asolution of Carbon disullid 7 parts Benzol 25 Sulfur 10 then adding and emulsifying wood alcohol parts.

The alcohol here again, acts as a sulfur eliminant throwing a part of the latter out of its solution in the carbon disullid, benzol, etc. This free sulfur remains in suspension and operates to retard the evaporation of the volatile solvents when exposed to the at mosphere.

A third modification consists in making a solution of Carbon disulfid a- 7 5 parts Benzol Sulfurized linseed oil 10 and then adding wood alcohol 15 parts.

. In the place of the vulcanized linseed oil which might be made by the action of sulfur or sulfur chlorid upon linseed oil under the proper conditions, I might use any other.

drying or semi-drying oil that has been submitted to the sulfurization process. The

. operation of this 'moditic'ation is similar to that of the second modification. The presence of the vulcanized oil gives the remover a thick jelly-like consistency, adapting it for eflicient use on walls and ceilings.

' in making the above removers I do not confine myself to the use of the solvents,

above mentioned but consider that I may make many substitutions therefor without departing from the essence of my invention. 1

' varnish comprising a supersaturated solu- Instead of benzol, or a part thereof, I might useany one or more of the following solvents the benzol homologues, as toluol, xylol, etc, the volatile petroleum hydrocarbons, such as benzin, gasolene, etc., carbon tetra-- chlorid, sulfuric ether, the aldehydes, ethyl varnish comprising a super-saturated solution of sulfur in a plurality of difierent sulfur solvents one of which is a free halogen compound of sulfur and a finish solvent sulfur eliminant miscible with said solvents.

' 2. A composition for removing paintor varnish comprising a volatile solvent anda solution of sulfur in a sulfur solvent capable of being chemically changed by exposure to produce an evaporation retarder for the volatile solvent.

3. A composition for removing paint or varnish comprising a mixture of volatile solvents and an evaporation retarder containing uncombined sulfur.

4. A composition for removing paint or varnish comprising a supersaturated solu-' tion of sulfur in a sulfur solvent and a sulfur eliminant miscible with said solvent.

5. A composition for removing paint or varnish comprising a supersaturated solvent of sulfur in a plurality of different sulfur solvents and a sulfur eliminant miscible with said solvents.

(5. A composition for removing paint or varnish comprising a supersaturated solution of sulfur in a plurality of different sulfur solvents one of which is free sulfur chlorid and a sulfur eliminant miscible with said solvents.

7. A composition for removing paint or varnish comprising a supersaturated solution of sulfur in carbon disulfid, sulfur chlorid and a sulfur eliminant miscible said solvents.

S. A composition for removing paint or v with tion of sulfur in carbon disulfid, sulfur chlorid, benzol and a sulfur eliminant misci ble with said solvents.

In testimony whereof I have signed my namein the presence of'two subscribing Witnesses.

CARLETON ELLIS.

V'Vitnesses:

. SAMUEL R. BELL,

HARRY W. Brown. 

